442890493 has 4 divisors (see below), whose sum is σ = 443153788. Its totient is φ = 442627200.

The previous prime is 442890473. The next prime is 442890499. The reversal of 442890493 is 394098244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81054009 + 361836484 = 9003^2 + 19022^2 .

It is a cyclic number.

It is not a de Polignac number, because 442890493 - 2¹³ = 442882301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442890499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129108 + ... + 132493.

It is an arithmetic number, because the mean of its divisors is an integer number (110788447).

Almost surely, 2^442890493 is an apocalyptic number.

It is an amenable number.

442890493 is a deficient number, since it is larger than the sum of its proper divisors (263295).

442890493 is a wasteful number, since it uses less digits than its factorization.

442890493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263294.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 442890493 is about 21044.9636017742. The cubic root of 442890493 is about 762.2523745943.

The spelling of 442890493 in words is "four hundred forty-two million, eight hundred ninety thousand, four hundred ninety-three".